Sometimes when you import BVH files you are thereby loading 30, 60, 120 keyframes per second of animation.

If the BVH file is of poor quality, your character will tremble and shake a lot.

Fixing this animation is very tedious since you have to contend with thousands of keyframes

mcjDecimate will let you reduce the number of keyframes

Installation

download the zip file in the attachments at the bottom of this page

unzip it in Daz Studio's content folder

typically C:\Program Files\DAZ\Studio\content

the script and the corresponding icon will be placed

in the scripts/mcasual folder

so you can find it in the Daz Studio content tab

in the Studio / Scripts / mcasual folder

there's also a zip file containing the manual

which is simply a copy of the page you are reading